- 4th International Conference on Informations Theoretic Security (ICITS), Shizuoka, Japan, Dec. 2009.
- Sixth Conference on Security in Communication Networks (SCN '08), Amalfi, Sept. 2008.
- 5th Theory of Cryptography Conference (TCC), New York, March 2008.
- 2005 IEEE Information Theory Workshop, Awaji Island, Japan, Oct. 2005 (Program Chair).
- 2005 IEEE International Symposium on Information Theory, Adelaide, 2005.
- 11th ACM Conference on Computer and Communications Security (CCS 2004), Washington, Oct. 2004.
- 2004 IEEE International Symp. on Inform. Theory and its Applications (ISITA), Parma, Oct. 2004.
- Security in Communication Networks (SCN'04), Amalfi, Italy, Sept. 2004.
- 2004 IEEE International Symposium on Information Theory, Chicago, July 2004.
- Public-Key Cryptography 2003, Miami, Jan. 2003.
- 2002 IEEE International Symposium on Information Theory, Lausanne, July 2002.
- 2001 IEEE International Symposium on Information Theory, Annapolis, July 2001.
- RSA 2001, Research Track, San Francisco, April 2001.
- Asiacrypt 2000, Kyoto, Japan, Dec. 2000.
- SIS 2000 (Sicherheit in Informationssystemen), Zurich, Oct. 2000.
- Financial Cryptography 2000, Anguila, Feb. 21--24, 2000.
- 2000 IEEE International Symposium on Information Theory, Sorrento, Italy, July 2000.
- Asiacrypt '99, Singapore, Nov. 1999.
- Security in Communication Networks (SCN'99), Amalfi, Italy, Sept. 1999.
- Fifth ACM Conference on Computer and Communications Security, San Francisco, November 1998.
- 5th European Symposium on Research in Computer Security (ESORICS), Louvain-la-Neuve, Belgium, Sept. 1998.
- CRYPTO '98, Santa Barbara, USA, Aug. 1998.
- SIS '98 (Sicherheit in Informationssystemen), Stuttgart, March 1998.
- ICICS '97: International Conf. on Inform. and Communications Security, Nov. 1997, Beijing, China.
- Commun. and Multimedia Security, Joint Working Conf. of IFIP TC-6 and TC-11, Athens, 1997.
- 1997 IEEE Information Theory Workshop, Longyearbyen, Norway, July 1997.
- 1997 IEEE International Symposium on Information Theory, Ulm, Germany, June 1997.
- Security in Communication Networks (SCN), Amalfi, Italy, Sept. 16-17, 1996.
- SIS '96 (Sicherheit in Informationssystemen), Vienna, March 21-22, 1996.
- EUROCRYPT '96, Zaragoza, Spain, May 12-16, 1996 (Program Chair).
- EUROCRYPT '95, Saint Malo, France, May 21-25, 1995.
- EUROCRYPT '94, Perugia, Italy, May 9-12, 1994.
- SIS '94 (Sicherheit in Informationssystemen), Zurich, March 10-11, 1994.
- CRYPTO '92, Santa Barbara, USA, Aug. 15-20, 1992.
- CRYPTO '91, Santa Barbara, USA, Aug. 11-15, 1991.
- EUROCRYPT '90, Aarhus, Denmark, May 21-24, 1990.